Oracle HCM Fusion as a web services - OAuth2.0 connection issue

[5307c267bd975cb62435e2356b90903 (Sailpoint Cipher)]

@srezzaki

We are integrating Oracle HCM Fusion as web services connector, we are changing the authentication type to OAuth2.0 client credentials grant type.

We are encountring this error :
Exception occurred in Test Connection. Error: Exception occurred while generating access token: Unable to generate access token.

The above exception is generated in Sailpoint for OAuth token call towards Fusion Cloud HCM, even though it’s successful in Postman.

We tried to configure the OAuth authentication as custom authentication but we are still getting errors .

access token url: https://idcs-1.identity.oraclecloud.com/oauth2/v1/token
client_id: ************
client secret: ***********
grant_type: client_credentials
scope: https://* customer:all/

If it works in Postman but fails in SailPoint ISC, the issue is usually with token request formatting. For Oracle HCM OAuth2 client credentials, ISC typically requires:

• scope URL-encoded correctly

• Content-Type: application/x-www-form-urlencoded

• client credentials sent in Authorization header (Basic base64(clientid:secret))

Most failures happen because ISC sends client credentials in body while Oracle IDCS expects them in the header.